Is this something Vivaldi isn't supposed to be compatible with? I honestly don't know since it isn't Chrome but supports Chrome Extensions and apps being installed through the Chrome store. But if I set Vivaldi as my default browser on OSX. Then install some Chrome Apps like Spotify for example. Then pin the icon to my dock for Chrome apps. Then open the Chrome app settings from the Hamburger menu when you click the icon in the dock. Vivaldi crashes.